Hydraulic scaler



May 12, 1931. H. c. BARNES ET AL, l,804,735

' HYDRAULIG scALER Filed Oct. 2, 1929 4 Sheets-Sheet l INVENTOR.

A TTORNEYS May 12, 1931. H. c. BARNES ET AL 1,804,735

. v HYDRAULIC scALER Filed Oct. 2, 1929 4 sheets-Sheet 2 May 12, 1931. H. c. BARNl-:s ET L HYDRAULIC SCALER Filed Oct. 2, 1929 4 Sheets-Sheet 3 i JNVENTOR.

' ,I V- W TORNEYS May 12, 1931. H. c. BARNES .ET AL HYDRAULIC SCALE Filed Oct. 2, 1929 4 Sheets-Sheet 4 INVENTOR M413 BY 19' w* ATTORNEYS' Patented May 12, 1931 UNITED sTATes PATENT OFFICE O HUG'H C. BARNES AND GEORGE A. DRIEST, OF MIDDLETOWN, OHIO, ASSIGNORS T AMERICAN ROLLING MILL omo COMPANY, Or MIDDLE'rowN, 01-110, A CORPORATION or' HYDRAULIC SCALER Application filed October 2, 1929. Serial No. 396,839. w

Our invention has to do with hydraulic apparatus for ,removing scale from hot met-v al, for example, in the removal of air scale from strip steel. It has been proposedto 5 remove scale from metal articles by directing upon their surfacesclosely spacecl blasts or jets of fluid under great pressure. This has necessitated the placing of pipes having jet forming members or a series of perforations for the same purpose, on either side of the metal articles across their path of travel as they are being carried along, say, by a roller conveyor. In 'order that the full efl'ect of the hydraulic jets may be utilized, it is necessary to place the nozzles or the perforated pipe, quite close to the article being treated. The Chief reason for the unsatisfactory result obtained with hydraulic scale removers has been due to the difiiculty of keeping the hydraulic fluid delivery system in order. The perforated pipe or nozzles soon clog with oxide, and are rendered useless, inasmuch as it is necessary to keep a full, continuous and steady direction of the jets uninterruptedly across the surface of the articles passing through. There has,

'in the past, been no way, short of disassembling the apparatus, to keep the perforations or nozzles clean, or in any Way to clean out the delivery pipes.

The primary obj ect of our invention then, is the provision of a hydraulic scale removal `system which may be kept Vcontinuously functioning, and which is not liable to the clogging which has rendered all hydraulic scale removal systems of which we have knowledge in the past, unsatisfactory I in operation. Another object of our inven- 40 tion is the provision of means facilitating the Cleaning out of the hydraulic delivery pipes without any but a niomentary interruption of the device.

Still another object of our invention is the provision of means whereby the length of the hydraulic spray may be varied for sheets of ldifl'ering widths.

These and other objects of our invention,

which we may hereinafter point out, or

`What we do, in brief, is to provide perforated hydraulic delivery pipes located one on either side, of the strip in its path of travel, with means for delivering water to them under heavy pressure at the center. This facilitates an even distribution of pressure in the jets. Then we provide a series of pistons, as will hereinafter be more fully described, Operating in these delivery tubcs, i

the function of which is first, to keep 'the perfo'rations in the pipes clear of scale and sediment, second, to limit the length of the jet series in proportion to the width of Sheet or strip being treated; and third, to enable usto open the hydraulic delivery pipes into Washing pipes, so that any Scale removed upon the interior of the hydraulic delivery p pipes may be periodically washed therefrom.

So that the pistons may readily be moved, but may nevertheless be held in place against the hydraulic pressure, we provide means acting upon the piston rocls comprising screw means and convenient means for its operation. We have shown in Figure 3, mounted upon a suitable foundation 1, rolls 2 of a roller conveyor for mctallic strips, bars, sheets, or the like, which follow a horifw livery pipes are indicated at 4, and are conof scale or sediment.

nected to each delivery pipe in the center by a welded connection 5, so that the fluid enters the delivery pipes at the center thereof and flows therefrom outwardly toward each end. Beyond the point at which the edge of the Sheet-s or strips to be treated will come along the delivery pipes 3 and 3a, we provide drainage or Wash-out openings 6 which are conveniently in the form of elongated slots of substantial length and breadth. A fitting 7 surrounds the delivery pipes at this point, and is adapted to receive fluid leaving the pipes through the slots 6. The fitting is connectedin any desired way, as by means of flanges, to washout pipes 8 for carrying away the wash water.

Within the delivery pipes 3 and 8a we provide pistons 9. It will be clear that such pistons, if moved along theperforated portions of the delivery pipes 3 and 3a, will serve to keep the jet perforations 3b clear and active and free from an accumulation It will also be clear that since the entrance of fluid into the delivery pipes is at the center thereof, these' pistons, by being caused to approach the center from either side more or less as desired, will cause the effective width of the jet series to vary, so that the jets may be adapted to spraying the entire surface but not .more

than the entire surface of the metal pieces passing beween the delivery pipes 3 and 30,. Finally, it will be clear that if the pistons are moved back far enough to uncover the openings 6 in the delivery pipes 3 and 3a, these pipes may 'be washed out through the pipes 8, so as to remove from them any sediment or scale which has collected within. By making it possible to adj ust the length of the spray to the width of a stri or bar being rolled, instead of using a fixe blanket spray corresponding to the maximum width of the strip, we save water and reduce the splash which occurs from spray streams outside the steel. We provide, preferably, long pistons o the balanced type to equalize the pressure on either side sufiicientl to allow easy adjust-ment while' in operatlon, and at the same time to keep the Wash-out ports 6 efectively covered. To this endwe provide two pistonsv interspaced and connected in tandem upon each of the piston rods 10, as clearly shown. The piston rods are connected to a yoke 11 on either end of the delivery pipes 3 and 3a- That is to say, the piston rod 10 in the upper delivery pipe and the pion rod 10a in the lower on each end will *be interconnected by the said yoke; and the yoke is threaded to accommodate a threaded shaft 12 b which the pistons may be moved. This sha is ournaled at either end to fixed frame supports-such as the yoke 13 afiixed to the delivery pipes, and a frame member 14. The shaft will be rotatably mounted in its bearings; but means are provided to prevent its longitudinal motion. A handwheel 15 on the end of the shaft provides a convenient means whereby it may be rotated; and it will be seen that a movement of this handwheel in a clockwise direction in Figure 1 will draw the yoke 11 ou'twardly, thus moving the plungers 9 in the delivery pipes outwardly. A reverse movement will tend to thrust the plungers in the delivery ipes nearer the center thereof. For smoot ness of operation, guide rods 16 may be employed,

of the sprays may be varied by a manipulation of the handwheel in approachingcor removing the pistons from the central point of the delivery pipes, and how sediment or foreign matter in the delivery pipes Vmay be washed out by withdrawing the pistons to a point beyond the Wash-out ports 6. In Figure 2 we have shown pistons in the Wash-out position. i.

In order to minimize splashing, a hood 18 may be built over the apparatus and a swinging bafile plate 19 caused to approach very closely or even to contact the surfaces of the strips or bars being rolled.

Various modifications may be made in our irvention without departing from tgspirit o it.

Having thus described our .invention, what we claim as new and desire to' secure by Letters Patent, is

1. In a hydraulio scale removing device,- perforated delivery pipes to form a spray, means for introducing fluid under pressure at the center of the said pipes, and means for adjusting the effective width of the said spray, said means comprising pistons movable in said pipes to or over said central draulic pressure.

I perforated delivery pipes to form a spray,

means for introducing fluid under pressure at the center of the said pipes, and means for adjusting the effective width of the said spray, said means comprising pistons' movable in said pipes to or over said central openings, Wash-out ports remote from said central openings, said pistons movable to uncover said Wash-out ports and means for ,holding said pistons in place against hyl3. In a hydraulic scale removing device, perforated delivery pipes to form a spray, means for introducing fluid under ressure at the center of the said pipes, an means for adjusting the effective width of the said spray, said means comprising pistons movable in said pipes to or ,over said central openings, Wash-out ports remote from said central openings, said pistons movable' to uncover said Wash-out ports, said pistons movable within said pipes so as to pass over all of the perforations therein to dislodge pressure-to said ports, pistons Operating in said pipes from either end, said pistons affixed to piston rods extending through glands in the ends of said pipes, opposlte pairs of said rods attached to a yoke, and

means for moving the said yoke com rising a threaded portion in said oke, an a cooperating threaded shaft Journaled to a fixed support, and means for` turnin said shaft, said pistons being of the ba anced type in tandem, Wash-out ports in portions of said delivery pipes remote from the center, said pistons being movable to uncover said Wash-out ports.

HGH O. BARNES.

GEORGE A. DRIEST.

scale and'sediment therefrom and means for holding said pistons in place against 'hydraulic pressure.

4. In a h draulic scale removing device, perforated elivery pipes to form .a spray, means for introducing fluid under pressure at the center of the said pipes, and means for adjusting the efi'ective width of the said spray, said means comprisi-ng pistons movable in saidv pipes to or over'said central openings, Wash-out ports remote from said central openings, said pistons movable to uncover said Wash-out ports, said pistons movable Within said pipes so as to pass over all of the perforations thereinso as to dislodge scale and sediment therefrom, and means for movingsaid pistons comprising iston rods extending 'beyond the ends o said pipes, and screW means to move said rods.

5. In a hydraulic scale remover, perforated delivery pipes located on either side of the path of travel of an article so as to cover it with a spray, central ports in said pipes, and means for delivering fluid under pressure to said ports, pistons Operating in said pipes from either end, said pistons affiXed to piston rods extending through glands in the ends of said pipes, opposite pairs of said rods attached to a yoke, and

means for moving the said yoke comprisingv cover it with a spray, central ports in said pipes, and means for delivering fluid under 

